[Imaging observation and analysis of condylar osteosclerosis in temporomandibular joint osteoarthrosis].

Zhonghua Kou Qiang Yi Xue Za Zhi

Department of Oral and Maxillofacial Surgery, General Hospital of Chinese PLA, Beijing 100853, China.

Published: December 2022

AI Article Synopsis

  • The study examines the different imaging characteristics of condylar sclerosis in patients with temporomandibular joint osteoarthrosis, aiming to understand its significance through various imaging techniques.
  • A total of 50 patients (38 with unilateral and 12 with bilateral condylar sclerosis) were analyzed using cone-beam CT, spiral CT, MRI, and radionuclide bone imaging over a period of three years.
  • Findings indicated that while CBCT detected all cases of condylar sclerosis, spiral CT provided clearer images; significant differences were found in disc displacement between sclerotic and non-sclerotic sides, and MRI showed varying signal intensities for sclerosis.

Article Abstract

To observe the different imaging manifestations of condylar sclerosis in temporomandibular joint osteoarthrosis and explore the imaging significance of condylar sclerosis. From January 2018 to December 2020, 50 patients with temporomandibular joint condylar sclerosis were examined by cone-beam CT (CBCT) and underwent spiral CT, MRI and radionuclide bone imaging at the Department of Oral and Maxillofacial Surgery in General Hospital of Chinese PLA. There were 15 males and 35 females aged from 16 to 65 years with age of (42.7±14.5) years. The imaging manifestations of CBCT, spiral CT, MRI and radionuclide bone imaging, joint disc displacement and abnormal bone metabolism of condylar sclerosis were analyzed. And the area of condylar sclerosis was graded according to the image of CBCT. A total of 50 patients were included, including 38 unilateral condylar sclerosis, 12 patients with bilateral condylar sclerosis, the total condylar sclerosis were 66. There was no significant difference between the detection rate of further spiral CT (95.5%, 63/66) and CBCT (100.0%, 66/66) (corrected χ²=1.36,=0.244). The area of condylar sclerosis was (35.5±4.5) mm, ranged from 1 to 100 mm. In addition, spiral CT showed more clearly condylar sclerosis than CBCT. Sclerosis can occur in all parts of condyle, mainly in the upper middle region (68.2%,45/66) in coronal position and in the upper front region (71.2%,47/66) in sagittal position. Fifty-seven condylar sclerosis were detected by MRI, including 4(4/19) condylar sclerosis less than 4 mm. There was significant difference in the displacement of temporomandibular joint disc between the sclerotic side and the non sclerotic side (χ²=10.09, =0.006). MRI display the condylar sclerosis showed low signal (56/62), followed by high signal (5/62) and medium signal (1/62). Radionuclide bone imaging showed that 4 of the 38 patients with unilateral condyle sclerosis had symmetrical bone metabolism, 34 had abnormal bone metabolism, and 21 patients had concentrated on the non-sclerotic side. Radionuclide bone imaging showed that 4 of the 38 patients with unilateral condyle sclerosis had symmetrical bone metabolism and 34 had abnormal bone metabolism. Spiral CT is more accurate than CBCT in terms of condyle sclerosis through different imaging analysis, and the detection rate of both is higher than MRI. Most of condylar sclerosis showed different degrees of low signal on MRI. The condylar sclerosis side is usually manifested by abnormal bone metabolism.

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Source
http://dx.doi.org/10.3760/cma.j.cn112144-20220809-00466DOI Listing

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